The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

This unit of competency could be assessed in the workplace or a close simulation of the workplace environment providing that simulated or project-based assessment techniques fully replicate plumbing and services workplace conditions, materials, activities, responsibilities and procedures.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

A person who demonstrates competency in this unit must be able to provide evidence of:

evaluating and documenting design parameters, including client, regulatory, manufacturer and Australian and New Zealand standard requirements for a range of gas bulk storage systems

planning and detailing system components, including:

meters

pipes

regulators

valves

vaporisers

designing a deluge system

designing and sizing gas bulk storage systems using appropriate software

preparing plans for a range of gas bulk storage systems to industry standards

preparing specifications for gas bulk storage system installations

preparing testing and commissioning schedules

producing operation and maintenance manuals.

Context of and specific resources for assessment

This competency is to be assessed using standard and authorised work practices, safety requirements and environmental constraints.

Assessment of essential underpinning knowledge will usually be conducted in an off-site context.

Assessment is to comply with relevant regulatory or Australian standards' requirements.

Resource implications for assessment include:

an induction procedure and requirement

realistic tasks or simulated tasks covering the minimum task requirements

relevant specifications and work instructions

tools and equipment appropriate to applying safe work practices and relevant to planning processes, including calculators

support materials appropriate to activity, including computers and software

workplace instructions relating to safe working practices and addressing hazards and emergencies

material safety data sheets

research resources, including industry related systems information.

Reasonable adjustments for people with disabilities must be made to assessment processes where required. This could include access to modified equipment and other physical resources, and the provision of appropriate assessment support.

Method of assessment

Assessment methods must:

satisfy the endorsed Assessment Guidelines of the Construction, Plumbing and Services Training Package

include direct observation of tasks in real or simulated work conditions, with questioning to confirm the ability to consistently identify and correctly interpret the essential underpinning knowledge required for practical application

reinforce the integration of employability skills with workplace tasks and job roles

confirm that competency is verified and able to be transferred to other circumstances and environments.

Validity and sufficiency of evidence requires that:

competency will need to be demonstrated over a period of time reflecting the scope of the role and the practical requirements of the workplace

where the assessment is part of a structured learning experience the evidence collected must relate to a number of performances assessed at different points in time and separated by further learning and practice, with a decision on competency only taken at the point when the assessor has complete confidence in the person's demonstrated ability and applied knowledge

all assessment that is part of a structured learning experience must include a combination of direct, indirect and supplementary evidence.

Assessment processes and techniques should as far as is practical take into account the language, literacy and numeracy capacity of the candidate in relation to the competency being assessed.

Supplementary evidence of competency may be obtained from relevant authenticated documentation from third parties, such as existing supervisors, team leaders or specialist training staff.

Required skills

Required skills for this unit are:

communication skills to:

communicate with others to ensure safe and effective work practices

confirm job specifications and client requirements

enable clear and direct communication, using questioning to identify and confirm requirements, share information, listen and understand

read and interpret:

documentation from a variety of sources

standards and manufacturer requirements and manuals

plans, specifications, drawings and design briefs

statutory and regulatory requirements

use language and concepts appropriate to cultural differences

use and interpret non-verbal communication, such as hand signals

written skills to prepare documentation, including:

operation and maintenance manual

plans, specifications and schedules

determining relevant gas storage installation details

innovation skills to develop creative and responsive approaches

numeracy skills to apply measurements and calculations

planning and organisational skills to:

research, collect, organise and understand information relating to the design of gas bulk storage systems

take initiative and make decisions

preparing gas storage system specifications

problem solving skills to analyse requirements, consider options and design an appropriate system

teamwork skills to work with others to action tasks and relate to people from a range of cultural and ethnic backgrounds and with varying physical and mental abilities.

Required knowledge

Required knowledge for this unit is:

common terminology and definitions used in design of gas bulk storage systems for all classes of building

drafting principles

nature of materials used and effects of performance under various conditions

principles of technology in the design of gas bulk storage systems

requirements of state regulatory authorities, Australian standards and manufacturer specifications, including hazards identified in relation to devices and systems used

workplace safety requirements, including relevant statutory regulations, codes and standards.

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Scope of work includes:

interpretation of plans and specifications

principles of operation of various types of LPG components and fault conditions in LPG components

sizing and documenting layout of gas bulk storage installations, including fire protection systems, such as:

chemical injection

extinguishers

hose reels

hydrants

monitors

portable and fixed types of firefighting equipment

spray systems.

Design requirements include:

architectural specifications

builder specifications

owner requirements

specialist gas use applications.

Cost-benefit analysis includes:

comparison of range of suitable materials and system choices available to enable cost-effective choices to be made without compromising integrity of project.

Statutory and regulatory requirements and Australian and New Zealand standards include:

Acts, regulations and local and state government policies, including group and strata titling

AS/NZS1596 The storage and handling of LP gas

AS2430 Classification of hazardous areas

AS5601 (AG601) Gas installations

Building Code of Australia.

Manufacturer requirements include:

pump tables

sizing tables

specifications

technical and trade manuals.

Desktop study includes collection and interpretation of existing data for design purposes from:

architectural and building plans

council plans

developer plans

other documents, including:

applications

forms

other reports as available.

Performance requirements include:

operational and safety requirements, established using Australian and New Zealand standards, and local and state authority plans.

Layout of pipework systems should:

not unduly affect building integrity and aesthetic appeal

have principles of economy, serviceability, durability and fit for use applied.

Control valves and fittings may include:

valves:

applications of valves and code requirements for installation

emergency shutdown valves

excess flow valves

hydrostatic relief valves

individual valve types

fittings:

bends

inspection openings

junctions

meters

reflux valves

staged regulators

traps

vaporisers.

Meters include:

mass flow

positive displacement

turbine.

System calculations include:

determination of flow and appliance loadings

interpretation of design charts and tables

pipe sizing calculations.

Pipe fixings include:

anchors

bedding

bracket spacing

concrete support

corrosion protection

cover

hanging brackets

material requirements

saddles

wall and ceiling brackets.

Materials include:

concrete

copper

fittings and valves

high density polyethylene (HDPE)

measures to prevent the spread of fire.

Jointing methods include:

brazing

mechanical joints

solvent cement welding

threading.

Installation requirements include:

bedding

clipping

concrete support

installation details

jointing requirements

level of workmanship.

Plans include:

axonometrics

cross-sections

details

elevations

isometrics

schematics, which may be produced using:

pencil

Indian ink

pigment liner

computer generation

sections.

Specification includes:

clipping

details of specialised components

jointing

manufacturer requirements

materials

valves

workmanship.

Testing includes:

air pressure test

gas leak test

quality assurance (QA) audit.

Commissioning schedule includes:

flow testing

leak check

vaporisation rate check.

Operation and maintenance manual includes:

leak detection

regular maintenance requirements

safety inspection

yearly inspection.